From 47da8ee681d04e68ca1b1812c10e28162150d453 Mon Sep 17 00:00:00 2001 From: Sridhar Samudrala Date: Tue, 27 Jun 2006 13:29:00 -0700 Subject: [PATCH] [TCP]: Export accept queue len of a TCP listening socket via rx_queue While debugging a TCP server hang issue, we noticed that currently there is no way for a user to get the acceptq backlog value for a TCP listen socket. All the standard networking utilities that display socket info like netstat, ss and /proc/net/tcp have 2 fields called rx_queue and tx_queue. These fields do not mean much for listening sockets. This patch uses one of these unused fields(rx_queue) to export the accept queue len for listening sockets. Signed-off-by: Sridhar Samudrala Signed-off-by: David S. Miller --- net/ipv4/tcp_diag.c | 5 ++++- net/ipv4/tcp_ipv4.c | 3 ++- net/ipv6/tcp_ipv6.c | 3 ++- 3 files changed, 8 insertions(+), 3 deletions(-) diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c index c148c1081880..b56399c7cc12 100644 --- a/net/ipv4/tcp_diag.c +++ b/net/ipv4/tcp_diag.c @@ -26,7 +26,10 @@ static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r, const struct tcp_sock *tp = tcp_sk(sk); struct tcp_info *info = _info; - r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq; + if (sk->sk_state == TCP_LISTEN) + r->idiag_rqueue = sk->sk_ack_backlog; + else + r->idiag_rqueue = tp->rcv_nxt - tp->copied_seq; r->idiag_wqueue = tp->write_seq - tp->snd_una; if (info != NULL) tcp_get_info(sk, info); diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 25ecc6e2478b..4c6ef47eb1c3 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1726,7 +1726,8 @@ static void get_tcp4_sock(struct sock *sp, char *tmpbuf, int i) sprintf(tmpbuf, "%4d: %08X:%04X %08X:%04X %02X %08X:%08X %02X:%08lX " "%08X %5d %8d %lu %d %p %u %u %u %u %d", i, src, srcp, dest, destp, sp->sk_state, - tp->write_seq - tp->snd_una, tp->rcv_nxt - tp->copied_seq, + tp->write_seq - tp->snd_una, + (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq), timer_active, jiffies_to_clock_t(timer_expires - jiffies), icsk->icsk_retransmits, diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c index a50eb306e9e2..b36d5b2e7c30 100644 --- a/net/ipv6/tcp_ipv6.c +++ b/net/ipv6/tcp_ipv6.c @@ -1469,7 +1469,8 @@ static void get_tcp6_sock(struct seq_file *seq, struct sock *sp, int i) dest->s6_addr32[0], dest->s6_addr32[1], dest->s6_addr32[2], dest->s6_addr32[3], destp, sp->sk_state, - tp->write_seq-tp->snd_una, tp->rcv_nxt-tp->copied_seq, + tp->write_seq-tp->snd_una, + (sp->sk_state == TCP_LISTEN) ? sp->sk_ack_backlog : (tp->rcv_nxt - tp->copied_seq), timer_active, jiffies_to_clock_t(timer_expires - jiffies), icsk->icsk_retransmits, -- 2.20.1